./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/bigshot_s2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:32:08,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:32:08,566 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:32:08,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:32:08,574 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:32:08,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:32:08,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:32:08,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:32:08,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:32:08,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:32:08,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:32:08,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:32:08,622 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:32:08,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:32:08,625 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:32:08,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:32:08,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:32:08,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:32:08,626 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:32:08,627 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:32:08,627 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:32:08,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:32:08,628 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:32:08,628 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:32:08,629 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:32:08,629 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:32:08,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:32:08,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:32:08,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:32:08,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:08,633 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:32:08,633 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:32:08,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:32:08,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:32:08,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:32:08,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:32:08,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:32:08,634 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:32:08,634 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2023-11-12 02:32:08,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:32:09,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:32:09,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:32:09,007 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:32:09,008 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:32:09,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-12 02:32:12,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:32:12,482 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:32:12,483 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-12 02:32:12,503 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/data/8cd9755ab/5478356a132848228e1a7a1d39637e7d/FLAG47506d5d6 [2023-11-12 02:32:12,517 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/data/8cd9755ab/5478356a132848228e1a7a1d39637e7d [2023-11-12 02:32:12,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:32:12,521 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:32:12,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:12,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:32:12,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:32:12,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:12" (1/1) ... [2023-11-12 02:32:12,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517200fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:12, skipping insertion in model container [2023-11-12 02:32:12,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:12" (1/1) ... [2023-11-12 02:32:12,592 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:32:13,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:13,352 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:32:13,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:13,526 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:32:13,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13 WrapperNode [2023-11-12 02:32:13,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:13,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:13,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:32:13,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:32:13,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,574 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,616 INFO L138 Inliner]: procedures = 323, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-12 02:32:13,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:13,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:32:13,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:32:13,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:32:13,628 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:32:13,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:32:13,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:32:13,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:32:13,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (1/1) ... [2023-11-12 02:32:13,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:13,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:13,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:32:13,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:32:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:32:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:32:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 02:32:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:32:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:32:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:32:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:32:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:32:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:32:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:32:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:32:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:32:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:32:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:32:13,771 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:32:13,990 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:32:13,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:32:14,235 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:32:14,243 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:32:14,244 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:32:14,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:14 BoogieIcfgContainer [2023-11-12 02:32:14,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:32:14,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:32:14,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:32:14,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:32:14,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:32:12" (1/3) ... [2023-11-12 02:32:14,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a962b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:14, skipping insertion in model container [2023-11-12 02:32:14,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:13" (2/3) ... [2023-11-12 02:32:14,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a962b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:14, skipping insertion in model container [2023-11-12 02:32:14,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:14" (3/3) ... [2023-11-12 02:32:14,256 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2023-11-12 02:32:14,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:32:14,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-12 02:32:14,277 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:32:14,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:32:14,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 244 flow [2023-11-12 02:32:14,508 INFO L124 PetriNetUnfolderBase]: 5/113 cut-off events. [2023-11-12 02:32:14,509 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:14,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 5/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-11-12 02:32:14,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 244 flow [2023-11-12 02:32:14,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 108 transitions, 228 flow [2023-11-12 02:32:14,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:14,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 108 transitions, 228 flow [2023-11-12 02:32:14,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 108 transitions, 228 flow [2023-11-12 02:32:14,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 108 transitions, 228 flow [2023-11-12 02:32:14,607 INFO L124 PetriNetUnfolderBase]: 5/108 cut-off events. [2023-11-12 02:32:14,607 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:14,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 5/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-11-12 02:32:14,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 360 [2023-11-12 02:32:19,770 INFO L134 LiptonReduction]: Checked pairs total: 492 [2023-11-12 02:32:19,771 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-11-12 02:32:19,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:19,795 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e4459af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:19,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-12 02:32:19,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:19,797 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:32:19,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:19,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:19,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:32:19,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:19,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash 448, now seen corresponding path program 1 times [2023-11-12 02:32:19,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:19,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410228639] [2023-11-12 02:32:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:19,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:19,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410228639] [2023-11-12 02:32:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410228639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:19,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:19,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:32:19,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989524226] [2023-11-12 02:32:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:32:19,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:32:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:32:20,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 245 [2023-11-12 02:32:20,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:20,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 245 [2023-11-12 02:32:20,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:20,106 INFO L124 PetriNetUnfolderBase]: 26/69 cut-off events. [2023-11-12 02:32:20,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:20,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 69 events. 26/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 194 event pairs, 18 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 114. Up to 69 conditions per place. [2023-11-12 02:32:20,108 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-12 02:32:20,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 118 flow [2023-11-12 02:32:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:32:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:32:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 244 transitions. [2023-11-12 02:32:20,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49795918367346936 [2023-11-12 02:32:20,142 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 244 transitions. [2023-11-12 02:32:20,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 244 transitions. [2023-11-12 02:32:20,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 244 transitions. [2023-11-12 02:32:20,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 122.0) internal successors, (244), 2 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,157 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,159 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 74 flow. Second operand 2 states and 244 transitions. [2023-11-12 02:32:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 118 flow [2023-11-12 02:32:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:32:20,165 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 58 flow [2023-11-12 02:32:20,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-11-12 02:32:20,171 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-12 02:32:20,171 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 58 flow [2023-11-12 02:32:20,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:20,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:32:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:32:20,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 440822, now seen corresponding path program 1 times [2023-11-12 02:32:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642017324] [2023-11-12 02:32:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:20,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:20,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642017324] [2023-11-12 02:32:20,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642017324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:20,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:20,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:32:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213411303] [2023-11-12 02:32:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:20,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:20,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 245 [2023-11-12 02:32:20,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:20,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 245 [2023-11-12 02:32:20,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:20,640 INFO L124 PetriNetUnfolderBase]: 25/67 cut-off events. [2023-11-12 02:32:20,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 67 events. 25/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 193 event pairs, 15 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 135. Up to 63 conditions per place. [2023-11-12 02:32:20,643 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-12 02:32:20,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 118 flow [2023-11-12 02:32:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-11-12 02:32:20,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-11-12 02:32:20,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-11-12 02:32:20,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-11-12 02:32:20,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:20,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-11-12 02:32:20,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,663 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 58 flow. Second operand 3 states and 329 transitions. [2023-11-12 02:32:20,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 118 flow [2023-11-12 02:32:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:20,666 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 66 flow [2023-11-12 02:32:20,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-12 02:32:20,670 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-12 02:32:20,670 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 66 flow [2023-11-12 02:32:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:20,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:32:20,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:32:20,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:20,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 440821, now seen corresponding path program 1 times [2023-11-12 02:32:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:20,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508394492] [2023-11-12 02:32:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:20,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508394492] [2023-11-12 02:32:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508394492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:20,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:20,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:32:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176482646] [2023-11-12 02:32:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:20,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:20,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-11-12 02:32:20,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:20,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-11-12 02:32:20,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:20,948 INFO L124 PetriNetUnfolderBase]: 24/64 cut-off events. [2023-11-12 02:32:20,949 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:32:20,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 64 events. 24/64 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 179 event pairs, 16 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 135. Up to 62 conditions per place. [2023-11-12 02:32:20,950 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-12 02:32:20,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 114 flow [2023-11-12 02:32:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-12 02:32:20,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312925170068027 [2023-11-12 02:32:20,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-12 02:32:20,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-12 02:32:20,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:20,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-12 02:32:20,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,962 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 66 flow. Second operand 3 states and 317 transitions. [2023-11-12 02:32:20,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 114 flow [2023-11-12 02:32:20,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:32:20,964 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2023-11-12 02:32:20,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-12 02:32:20,966 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-12 02:32:20,966 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2023-11-12 02:32:20,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:20,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:20,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:32:20,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:20,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 13666476, now seen corresponding path program 1 times [2023-11-12 02:32:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:20,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774588160] [2023-11-12 02:32:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:20,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:21,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774588160] [2023-11-12 02:32:21,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774588160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:21,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:21,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162628617] [2023-11-12 02:32:21,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:21,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:21,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 245 [2023-11-12 02:32:21,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:21,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 245 [2023-11-12 02:32:21,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:21,313 INFO L124 PetriNetUnfolderBase]: 24/63 cut-off events. [2023-11-12 02:32:21,313 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 63 events. 24/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 176 event pairs, 16 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 131. Up to 61 conditions per place. [2023-11-12 02:32:21,315 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-12 02:32:21,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 108 flow [2023-11-12 02:32:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-11-12 02:32:21,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2023-11-12 02:32:21,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-11-12 02:32:21,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-11-12 02:32:21,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:21,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-11-12 02:32:21,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,332 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 325 transitions. [2023-11-12 02:32:21,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 108 flow [2023-11-12 02:32:21,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:32:21,338 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 58 flow [2023-11-12 02:32:21,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-12 02:32:21,340 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-12 02:32:21,341 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 58 flow [2023-11-12 02:32:21,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:21,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:32:21,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:32:21,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:21,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 248588987, now seen corresponding path program 1 times [2023-11-12 02:32:21,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:21,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528485650] [2023-11-12 02:32:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:21,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:21,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528485650] [2023-11-12 02:32:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528485650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:21,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:21,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344732163] [2023-11-12 02:32:21,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:21,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:21,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:21,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-11-12 02:32:21,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:21,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-11-12 02:32:21,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:21,736 INFO L124 PetriNetUnfolderBase]: 10/35 cut-off events. [2023-11-12 02:32:21,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 35 events. 10/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 68 event pairs, 6 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 73. Up to 33 conditions per place. [2023-11-12 02:32:21,738 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-12 02:32:21,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 90 flow [2023-11-12 02:32:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-12 02:32:21,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122448979591837 [2023-11-12 02:32:21,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-12 02:32:21,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-12 02:32:21,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:21,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-12 02:32:21,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,746 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 58 flow. Second operand 3 states and 303 transitions. [2023-11-12 02:32:21,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 90 flow [2023-11-12 02:32:21,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:32:21,748 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 50 flow [2023-11-12 02:32:21,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-12 02:32:21,751 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -11 predicate places. [2023-11-12 02:32:21,751 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 50 flow [2023-11-12 02:32:21,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:21,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:21,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:21,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:32:21,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:21,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1191122056, now seen corresponding path program 1 times [2023-11-12 02:32:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:21,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417647090] [2023-11-12 02:32:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417647090] [2023-11-12 02:32:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417647090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:21,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:21,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730573152] [2023-11-12 02:32:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:21,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:21,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:22,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 245 [2023-11-12 02:32:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:22,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:22,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 245 [2023-11-12 02:32:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:22,266 INFO L124 PetriNetUnfolderBase]: 10/34 cut-off events. [2023-11-12 02:32:22,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 34 events. 10/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 67 event pairs, 2 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 72. Up to 19 conditions per place. [2023-11-12 02:32:22,267 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 17 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2023-11-12 02:32:22,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-12 02:32:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:32:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:32:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-11-12 02:32:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3653061224489796 [2023-11-12 02:32:22,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-11-12 02:32:22,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-11-12 02:32:22,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:22,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-11-12 02:32:22,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:22,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:22,275 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:22,276 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 50 flow. Second operand 4 states and 358 transitions. [2023-11-12 02:32:22,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-12 02:32:22,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:32:22,277 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 52 flow [2023-11-12 02:32:22,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-12 02:32:22,278 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -11 predicate places. [2023-11-12 02:32:22,278 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 52 flow [2023-11-12 02:32:22,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:22,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:22,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:32:22,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:22,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1191122094, now seen corresponding path program 1 times [2023-11-12 02:32:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:22,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833144552] [2023-11-12 02:32:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:22,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:22,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833144552] [2023-11-12 02:32:22,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833144552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:22,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:22,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226849320] [2023-11-12 02:32:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:22,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:22,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:23,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 245 [2023-11-12 02:32:23,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:23,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 245 [2023-11-12 02:32:23,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:23,143 INFO L124 PetriNetUnfolderBase]: 15/45 cut-off events. [2023-11-12 02:32:23,143 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:32:23,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 45 events. 15/45 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 104 event pairs, 6 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 100. Up to 35 conditions per place. [2023-11-12 02:32:23,144 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 20 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2023-11-12 02:32:23,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 114 flow [2023-11-12 02:32:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:32:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:32:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2023-11-12 02:32:23,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38448979591836735 [2023-11-12 02:32:23,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2023-11-12 02:32:23,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2023-11-12 02:32:23,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:23,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2023-11-12 02:32:23,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,153 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 5 states and 471 transitions. [2023-11-12 02:32:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 114 flow [2023-11-12 02:32:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:32:23,155 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 67 flow [2023-11-12 02:32:23,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-12 02:32:23,156 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -9 predicate places. [2023-11-12 02:32:23,156 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 67 flow [2023-11-12 02:32:23,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:23,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:23,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:32:23,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:23,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1191122166, now seen corresponding path program 1 times [2023-11-12 02:32:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108996808] [2023-11-12 02:32:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:23,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:23,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:23,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108996808] [2023-11-12 02:32:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108996808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:23,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:23,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143839615] [2023-11-12 02:32:23,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:23,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:23,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 245 [2023-11-12 02:32:23,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:23,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 245 [2023-11-12 02:32:23,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:23,480 INFO L124 PetriNetUnfolderBase]: 14/41 cut-off events. [2023-11-12 02:32:23,480 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:32:23,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 41 events. 14/41 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 5 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 102. Up to 32 conditions per place. [2023-11-12 02:32:23,481 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 20 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2023-11-12 02:32:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 119 flow [2023-11-12 02:32:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:32:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:32:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-11-12 02:32:23,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2023-11-12 02:32:23,484 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-11-12 02:32:23,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-11-12 02:32:23,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:23,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-11-12 02:32:23,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,489 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 67 flow. Second operand 4 states and 410 transitions. [2023-11-12 02:32:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 119 flow [2023-11-12 02:32:23,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:32:23,490 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 72 flow [2023-11-12 02:32:23,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-12 02:32:23,491 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -8 predicate places. [2023-11-12 02:32:23,491 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 72 flow [2023-11-12 02:32:23,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:23,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:32:23,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:23,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -524248309, now seen corresponding path program 1 times [2023-11-12 02:32:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638952889] [2023-11-12 02:32:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638952889] [2023-11-12 02:32:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638952889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693114174] [2023-11-12 02:32:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:23,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2023-11-12 02:32:23,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:23,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2023-11-12 02:32:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:23,765 INFO L124 PetriNetUnfolderBase]: 12/34 cut-off events. [2023-11-12 02:32:23,766 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-12 02:32:23,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 34 events. 12/34 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 47 event pairs, 1 based on Foata normal form. 4/31 useless extension candidates. Maximal degree in co-relation 97. Up to 16 conditions per place. [2023-11-12 02:32:23,766 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 16 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2023-11-12 02:32:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 114 flow [2023-11-12 02:32:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:32:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:32:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2023-11-12 02:32:23,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173469387755102 [2023-11-12 02:32:23,769 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 409 transitions. [2023-11-12 02:32:23,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 409 transitions. [2023-11-12 02:32:23,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:23,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 409 transitions. [2023-11-12 02:32:23,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,774 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,775 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 72 flow. Second operand 4 states and 409 transitions. [2023-11-12 02:32:23,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 114 flow [2023-11-12 02:32:23,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 104 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-12 02:32:23,776 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 68 flow [2023-11-12 02:32:23,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-11-12 02:32:23,777 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -10 predicate places. [2023-11-12 02:32:23,777 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 68 flow [2023-11-12 02:32:23,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:23,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:23,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:32:23,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:23,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 928172849, now seen corresponding path program 1 times [2023-11-12 02:32:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:23,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047133624] [2023-11-12 02:32:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047133624] [2023-11-12 02:32:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047133624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607340616] [2023-11-12 02:32:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:23,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:23,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:32:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:24,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:32:24,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:24,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:32:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:24,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607340616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:24,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:24,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-12 02:32:24,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725430034] [2023-11-12 02:32:24,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:32:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:32:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:32:24,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-11-12 02:32:24,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 68 flow. Second operand has 11 states, 11 states have (on average 95.18181818181819) internal successors, (1047), 11 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:24,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:24,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-11-12 02:32:24,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:24,909 INFO L124 PetriNetUnfolderBase]: 24/58 cut-off events. [2023-11-12 02:32:24,909 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:32:24,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 58 events. 24/58 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 4 based on Foata normal form. 6/56 useless extension candidates. Maximal degree in co-relation 168. Up to 34 conditions per place. [2023-11-12 02:32:24,910 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 23 selfloop transitions, 10 changer transitions 0/33 dead transitions. [2023-11-12 02:32:24,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 186 flow [2023-11-12 02:32:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:32:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:32:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 687 transitions. [2023-11-12 02:32:24,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058309037900874 [2023-11-12 02:32:24,915 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 687 transitions. [2023-11-12 02:32:24,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 687 transitions. [2023-11-12 02:32:24,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:24,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 687 transitions. [2023-11-12 02:32:24,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:24,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:24,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:24,923 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 68 flow. Second operand 7 states and 687 transitions. [2023-11-12 02:32:24,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 186 flow [2023-11-12 02:32:24,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:32:24,925 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 121 flow [2023-11-12 02:32:24,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-11-12 02:32:24,926 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-12 02:32:24,926 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 121 flow [2023-11-12 02:32:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.18181818181819) internal successors, (1047), 11 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:24,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:24,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:24,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:25,134 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:25,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:25,134 INFO L85 PathProgramCache]: Analyzing trace with hash 928172777, now seen corresponding path program 1 times [2023-11-12 02:32:25,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:25,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898035300] [2023-11-12 02:32:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:25,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:25,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898035300] [2023-11-12 02:32:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898035300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582882089] [2023-11-12 02:32:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:25,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:25,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:25,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:25,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:32:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:25,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:32:25,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:25,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-12 02:32:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:25,747 INFO L322 Elim1Store]: treesize reduction 38, result has 26.9 percent of original size [2023-11-12 02:32:25,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 33 [2023-11-12 02:32:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:25,907 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-12 02:32:25,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2023-11-12 02:32:25,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 02:32:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:25,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582882089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:26,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-12 02:32:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517086927] [2023-11-12 02:32:26,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:32:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:32:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:32:27,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 245 [2023-11-12 02:32:27,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 121 flow. Second operand has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:27,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:27,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 245 [2023-11-12 02:32:27,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:28,047 INFO L124 PetriNetUnfolderBase]: 21/49 cut-off events. [2023-11-12 02:32:28,047 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-12 02:32:28,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 49 events. 21/49 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 4 based on Foata normal form. 6/50 useless extension candidates. Maximal degree in co-relation 171. Up to 33 conditions per place. [2023-11-12 02:32:28,048 INFO L140 encePairwiseOnDemand]: 238/245 looper letters, 17 selfloop transitions, 12 changer transitions 0/29 dead transitions. [2023-11-12 02:32:28,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 187 flow [2023-11-12 02:32:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:32:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:32:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 688 transitions. [2023-11-12 02:32:28,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510204081632653 [2023-11-12 02:32:28,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 688 transitions. [2023-11-12 02:32:28,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 688 transitions. [2023-11-12 02:32:28,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:28,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 688 transitions. [2023-11-12 02:32:28,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,061 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,061 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 121 flow. Second operand 8 states and 688 transitions. [2023-11-12 02:32:28,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 187 flow [2023-11-12 02:32:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 165 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:32:28,064 INFO L231 Difference]: Finished difference. Result has 40 places, 25 transitions, 139 flow [2023-11-12 02:32:28,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=25} [2023-11-12 02:32:28,065 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-12 02:32:28,065 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 25 transitions, 139 flow [2023-11-12 02:32:28,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:28,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:28,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:28,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:28,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2088228032, now seen corresponding path program 1 times [2023-11-12 02:32:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245660205] [2023-11-12 02:32:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:28,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245660205] [2023-11-12 02:32:28,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245660205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:28,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:28,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:28,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759497137] [2023-11-12 02:32:28,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:28,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:28,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:28,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:28,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:28,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 245 [2023-11-12 02:32:28,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 25 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:28,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 245 [2023-11-12 02:32:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:28,372 INFO L124 PetriNetUnfolderBase]: 19/47 cut-off events. [2023-11-12 02:32:28,372 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-12 02:32:28,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 47 events. 19/47 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 8 based on Foata normal form. 2/47 useless extension candidates. Maximal degree in co-relation 187. Up to 44 conditions per place. [2023-11-12 02:32:28,376 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-12 02:32:28,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 25 transitions, 189 flow [2023-11-12 02:32:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-11-12 02:32:28,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-12 02:32:28,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-11-12 02:32:28,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-11-12 02:32:28,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:28,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-11-12 02:32:28,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,384 INFO L175 Difference]: Start difference. First operand has 40 places, 25 transitions, 139 flow. Second operand 3 states and 330 transitions. [2023-11-12 02:32:28,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 25 transitions, 189 flow [2023-11-12 02:32:28,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 25 transitions, 155 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-12 02:32:28,389 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 105 flow [2023-11-12 02:32:28,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-11-12 02:32:28,390 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-11-12 02:32:28,390 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 105 flow [2023-11-12 02:32:28,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:28,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:28,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:32:28,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:28,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:28,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1380325715, now seen corresponding path program 1 times [2023-11-12 02:32:28,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:28,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501285221] [2023-11-12 02:32:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:28,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501285221] [2023-11-12 02:32:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501285221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463667158] [2023-11-12 02:32:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:28,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:29,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 245 [2023-11-12 02:32:29,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 105 flow. Second operand has 7 states, 7 states have (on average 91.71428571428571) internal successors, (642), 7 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:29,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 245 [2023-11-12 02:32:29,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:29,384 INFO L124 PetriNetUnfolderBase]: 17/45 cut-off events. [2023-11-12 02:32:29,384 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-12 02:32:29,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 45 events. 17/45 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 62 event pairs, 1 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 145. Up to 29 conditions per place. [2023-11-12 02:32:29,385 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-11-12 02:32:29,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 157 flow [2023-11-12 02:32:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:32:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-11-12 02:32:29,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38299319727891157 [2023-11-12 02:32:29,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-11-12 02:32:29,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-11-12 02:32:29,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:29,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-11-12 02:32:29,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,397 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,397 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 105 flow. Second operand 6 states and 563 transitions. [2023-11-12 02:32:29,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 157 flow [2023-11-12 02:32:29,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:32:29,402 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 110 flow [2023-11-12 02:32:29,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-11-12 02:32:29,403 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-11-12 02:32:29,404 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 110 flow [2023-11-12 02:32:29,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.71428571428571) internal successors, (642), 7 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:29,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:32:29,405 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:29,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1521611560, now seen corresponding path program 1 times [2023-11-12 02:32:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:29,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677760211] [2023-11-12 02:32:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677760211] [2023-11-12 02:32:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677760211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119133500] [2023-11-12 02:32:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:29,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:29,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:29,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:32:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:29,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-12 02:32:29,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:29,967 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-12 02:32:29,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-12 02:32:29,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:30,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:30,134 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 02:32:30,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:32:30,178 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:32:30,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 02:32:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119133500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:30,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 17 [2023-11-12 02:32:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777909814] [2023-11-12 02:32:30,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:32:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:32:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:32:33,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 245 [2023-11-12 02:32:33,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 110 flow. Second operand has 18 states, 18 states have (on average 89.05555555555556) internal successors, (1603), 18 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:33,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:33,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 245 [2023-11-12 02:32:33,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:34,002 INFO L124 PetriNetUnfolderBase]: 25/68 cut-off events. [2023-11-12 02:32:34,002 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:32:34,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 68 events. 25/68 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 136 event pairs, 1 based on Foata normal form. 3/65 useless extension candidates. Maximal degree in co-relation 228. Up to 21 conditions per place. [2023-11-12 02:32:34,003 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 26 selfloop transitions, 13 changer transitions 0/39 dead transitions. [2023-11-12 02:32:34,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 256 flow [2023-11-12 02:32:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:32:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:32:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-11-12 02:32:34,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37369614512471655 [2023-11-12 02:32:34,008 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-11-12 02:32:34,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-11-12 02:32:34,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:34,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-11-12 02:32:34,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,017 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,017 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 110 flow. Second operand 9 states and 824 transitions. [2023-11-12 02:32:34,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 256 flow [2023-11-12 02:32:34,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 246 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:32:34,019 INFO L231 Difference]: Finished difference. Result has 43 places, 27 transitions, 168 flow [2023-11-12 02:32:34,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2023-11-12 02:32:34,020 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-11-12 02:32:34,020 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 168 flow [2023-11-12 02:32:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.05555555555556) internal successors, (1603), 18 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:34,022 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:34,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:32:34,229 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:34,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -650735434, now seen corresponding path program 2 times [2023-11-12 02:32:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:34,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251864058] [2023-11-12 02:32:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251864058] [2023-11-12 02:32:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251864058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873096355] [2023-11-12 02:32:34,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:32:34,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:34,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:34,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:34,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:32:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:32:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:34,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:32:34,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:34,687 INFO L322 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-12 02:32:34,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-12 02:32:34,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-12 02:32:34,726 INFO L322 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-12 02:32:34,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:32:34,756 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:32:34,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:32:34,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 02:32:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:32:34,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:32:34,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873096355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:34,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:32:34,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-11-12 02:32:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893419095] [2023-11-12 02:32:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:32:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:32:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:32:35,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 245 [2023-11-12 02:32:35,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:35,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 245 [2023-11-12 02:32:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:35,374 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2023-11-12 02:32:35,374 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-12 02:32:35,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 59 events. 22/59 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 98 event pairs, 2 based on Foata normal form. 6/59 useless extension candidates. Maximal degree in co-relation 239. Up to 32 conditions per place. [2023-11-12 02:32:35,376 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-11-12 02:32:35,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 28 transitions, 224 flow [2023-11-12 02:32:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:32:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 588 transitions. [2023-11-12 02:32:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-12 02:32:35,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 588 transitions. [2023-11-12 02:32:35,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 588 transitions. [2023-11-12 02:32:35,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:35,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 588 transitions. [2023-11-12 02:32:35,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.0) internal successors, (588), 6 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,388 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,388 INFO L175 Difference]: Start difference. First operand has 43 places, 27 transitions, 168 flow. Second operand 6 states and 588 transitions. [2023-11-12 02:32:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 28 transitions, 224 flow [2023-11-12 02:32:35,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 28 transitions, 197 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-12 02:32:35,392 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 157 flow [2023-11-12 02:32:35,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-11-12 02:32:35,394 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-11-12 02:32:35,394 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 157 flow [2023-11-12 02:32:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:35,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:35,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:32:35,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:35,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 199158914, now seen corresponding path program 2 times [2023-11-12 02:32:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062745446] [2023-11-12 02:32:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062745446] [2023-11-12 02:32:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062745446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261286695] [2023-11-12 02:32:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:32:36,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:36,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:36,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:32:36,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:32:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:36,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:32:36,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:36,337 INFO L322 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-12 02:32:36,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-12 02:32:36,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-12 02:32:36,362 INFO L322 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-12 02:32:36,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:32:36,399 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:32:36,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-12 02:32:36,413 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:32:36,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:32:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:36,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:36,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261286695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:36,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:36,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-12 02:32:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928434208] [2023-11-12 02:32:36,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:32:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:32:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:32:39,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 245 [2023-11-12 02:32:39,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 157 flow. Second operand has 25 states, 25 states have (on average 74.56) internal successors, (1864), 25 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:39,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:39,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 245 [2023-11-12 02:32:39,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:40,442 INFO L124 PetriNetUnfolderBase]: 26/63 cut-off events. [2023-11-12 02:32:40,442 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-11-12 02:32:40,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 63 events. 26/63 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 5 based on Foata normal form. 8/71 useless extension candidates. Maximal degree in co-relation 252. Up to 37 conditions per place. [2023-11-12 02:32:40,444 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 20 selfloop transitions, 18 changer transitions 0/38 dead transitions. [2023-11-12 02:32:40,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 285 flow [2023-11-12 02:32:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:32:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:32:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 917 transitions. [2023-11-12 02:32:40,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119047619047619 [2023-11-12 02:32:40,451 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 917 transitions. [2023-11-12 02:32:40,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 917 transitions. [2023-11-12 02:32:40,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:40,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 917 transitions. [2023-11-12 02:32:40,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 76.41666666666667) internal successors, (917), 12 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:40,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 245.0) internal successors, (3185), 13 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:40,463 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 245.0) internal successors, (3185), 13 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:40,463 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 157 flow. Second operand 12 states and 917 transitions. [2023-11-12 02:32:40,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 285 flow [2023-11-12 02:32:40,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 253 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-12 02:32:40,466 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 221 flow [2023-11-12 02:32:40,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-11-12 02:32:40,467 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2023-11-12 02:32:40,468 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 221 flow [2023-11-12 02:32:40,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.56) internal successors, (1864), 25 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:40,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:40,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:40,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:40,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:32:40,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:40,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1879156061, now seen corresponding path program 1 times [2023-11-12 02:32:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:40,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514615980] [2023-11-12 02:32:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514615980] [2023-11-12 02:32:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514615980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537495300] [2023-11-12 02:32:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:41,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:41,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:32:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:41,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 02:32:41,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:41,237 INFO L322 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2023-11-12 02:32:41,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 28 [2023-11-12 02:32:41,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:41,273 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:32:41,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 02:32:41,292 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-12 02:32:41,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2023-11-12 02:32:41,367 INFO L322 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-12 02:32:41,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-12 02:32:41,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:41,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:41,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-12 02:32:41,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:41,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537495300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:42,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:42,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-12 02:32:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784307924] [2023-11-12 02:32:42,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:42,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:32:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:32:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=288, Unknown=2, NotChecked=0, Total=342 [2023-11-12 02:32:45,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 245 [2023-11-12 02:32:45,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 221 flow. Second operand has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:45,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:45,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 245 [2023-11-12 02:32:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:45,559 INFO L124 PetriNetUnfolderBase]: 24/61 cut-off events. [2023-11-12 02:32:45,559 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-12 02:32:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 61 events. 24/61 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 2 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 272. Up to 40 conditions per place. [2023-11-12 02:32:45,560 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 26 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2023-11-12 02:32:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 33 transitions, 286 flow [2023-11-12 02:32:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:32:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2023-11-12 02:32:45,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3272108843537415 [2023-11-12 02:32:45,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 481 transitions. [2023-11-12 02:32:45,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 481 transitions. [2023-11-12 02:32:45,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:45,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 481 transitions. [2023-11-12 02:32:45,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:45,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:45,569 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:45,569 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 221 flow. Second operand 6 states and 481 transitions. [2023-11-12 02:32:45,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 33 transitions, 286 flow [2023-11-12 02:32:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 33 transitions, 237 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-12 02:32:45,572 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 177 flow [2023-11-12 02:32:45,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-11-12 02:32:45,573 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2023-11-12 02:32:45,573 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 177 flow [2023-11-12 02:32:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:45,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:45,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:45,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:32:45,781 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1707237128, now seen corresponding path program 2 times [2023-11-12 02:32:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303795414] [2023-11-12 02:32:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303795414] [2023-11-12 02:32:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303795414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72882656] [2023-11-12 02:32:46,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:32:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:46,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:46,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:32:46,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:32:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:46,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-12 02:32:46,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:46,439 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:32:46,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 02:32:46,464 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:46,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:46,492 INFO L322 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-12 02:32:46,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2023-11-12 02:32:46,555 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:46,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:46,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:46,733 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:46,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:46,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:46,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72882656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:47,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-12 02:32:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553352192] [2023-11-12 02:32:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:32:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:32:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=401, Unknown=2, NotChecked=0, Total=462 [2023-11-12 02:32:50,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 245 [2023-11-12 02:32:50,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 177 flow. Second operand has 22 states, 22 states have (on average 48.86363636363637) internal successors, (1075), 22 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:50,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:50,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 245 [2023-11-12 02:32:50,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:51,259 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2023-11-12 02:32:51,259 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-12 02:32:51,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 59 events. 22/59 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 2 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 226. Up to 35 conditions per place. [2023-11-12 02:32:51,260 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 25 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-11-12 02:32:51,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 33 transitions, 244 flow [2023-11-12 02:32:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:32:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:32:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 356 transitions. [2023-11-12 02:32:51,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2075801749271137 [2023-11-12 02:32:51,263 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 356 transitions. [2023-11-12 02:32:51,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 356 transitions. [2023-11-12 02:32:51,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:51,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 356 transitions. [2023-11-12 02:32:51,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.857142857142854) internal successors, (356), 7 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,268 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 177 flow. Second operand 7 states and 356 transitions. [2023-11-12 02:32:51,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 33 transitions, 244 flow [2023-11-12 02:32:51,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 33 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-12 02:32:51,271 INFO L231 Difference]: Finished difference. Result has 51 places, 28 transitions, 172 flow [2023-11-12 02:32:51,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=28} [2023-11-12 02:32:51,272 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-11-12 02:32:51,272 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 28 transitions, 172 flow [2023-11-12 02:32:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 48.86363636363637) internal successors, (1075), 22 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:51,273 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:51,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:51,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:32:51,487 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:51,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1164724786, now seen corresponding path program 3 times [2023-11-12 02:32:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637775662] [2023-11-12 02:32:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:52,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637775662] [2023-11-12 02:32:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637775662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:52,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869959841] [2023-11-12 02:32:52,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:32:52,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:52,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:52,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:32:52,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 02:32:52,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:52,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:32:52,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:52,741 INFO L322 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-12 02:32:52,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-12 02:32:52,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:52,774 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:52,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:52,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:52,850 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:32:52,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:32:52,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:53,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869959841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:53,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-11-12 02:32:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121209058] [2023-11-12 02:32:53,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:32:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:32:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=731, Unknown=7, NotChecked=0, Total=812 [2023-11-12 02:32:55,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 245 [2023-11-12 02:32:55,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 28 transitions, 172 flow. Second operand has 29 states, 29 states have (on average 42.689655172413794) internal successors, (1238), 29 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 245 [2023-11-12 02:32:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:56,410 INFO L124 PetriNetUnfolderBase]: 19/57 cut-off events. [2023-11-12 02:32:56,411 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-12 02:32:56,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 57 events. 19/57 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 3 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 218. Up to 22 conditions per place. [2023-11-12 02:32:56,412 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 23 selfloop transitions, 12 changer transitions 0/35 dead transitions. [2023-11-12 02:32:56,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 35 transitions, 251 flow [2023-11-12 02:32:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:32:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:32:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 444 transitions. [2023-11-12 02:32:56,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18122448979591838 [2023-11-12 02:32:56,416 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 444 transitions. [2023-11-12 02:32:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 444 transitions. [2023-11-12 02:32:56,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:56,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 444 transitions. [2023-11-12 02:32:56,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.4) internal successors, (444), 10 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:56,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:56,423 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:56,424 INFO L175 Difference]: Start difference. First operand has 51 places, 28 transitions, 172 flow. Second operand 10 states and 444 transitions. [2023-11-12 02:32:56,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 35 transitions, 251 flow [2023-11-12 02:32:56,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 35 transitions, 235 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:32:56,426 INFO L231 Difference]: Finished difference. Result has 54 places, 27 transitions, 172 flow [2023-11-12 02:32:56,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=27} [2023-11-12 02:32:56,427 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-11-12 02:32:56,427 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 27 transitions, 172 flow [2023-11-12 02:32:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 42.689655172413794) internal successors, (1238), 29 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:56,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:56,428 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:56,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:56,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:56,634 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:56,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1424519441, now seen corresponding path program 4 times [2023-11-12 02:32:56,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:56,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152107442] [2023-11-12 02:32:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152107442] [2023-11-12 02:32:57,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152107442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728485155] [2023-11-12 02:32:57,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:32:57,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:57,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:57,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:32:57,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:32:57,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:57,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 02:32:57,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:57,644 INFO L322 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2023-11-12 02:32:57,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 28 [2023-11-12 02:32:57,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:57,678 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:32:57,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 02:32:57,696 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-12 02:32:57,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2023-11-12 02:32:57,745 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-12 02:32:57,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-12 02:32:57,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:57,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:57,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-11-12 02:32:58,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-12 02:32:58,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-11-12 02:32:58,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-12 02:32:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:58,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:58,155 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_463) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset| 1)))) is different from false [2023-11-12 02:32:58,162 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_463) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 2 |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset|)))) is different from false [2023-11-12 02:32:58,220 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_463) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset| 4)))) is different from false [2023-11-12 02:32:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-11-12 02:32:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728485155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:58,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:58,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-12 02:32:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810682468] [2023-11-12 02:32:58,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:58,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:32:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:32:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=413, Unknown=6, NotChecked=126, Total=600 [2023-11-12 02:32:58,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 245 [2023-11-12 02:32:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 27 transitions, 172 flow. Second operand has 25 states, 25 states have (on average 42.68) internal successors, (1067), 25 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 245 [2023-11-12 02:32:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:59,575 INFO L124 PetriNetUnfolderBase]: 18/52 cut-off events. [2023-11-12 02:32:59,576 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-12 02:32:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 52 events. 18/52 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 2 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 202. Up to 25 conditions per place. [2023-11-12 02:32:59,577 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 23 selfloop transitions, 8 changer transitions 0/31 dead transitions. [2023-11-12 02:32:59,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 31 transitions, 226 flow [2023-11-12 02:32:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:32:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:32:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 356 transitions. [2023-11-12 02:32:59,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1816326530612245 [2023-11-12 02:32:59,580 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 356 transitions. [2023-11-12 02:32:59,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 356 transitions. [2023-11-12 02:32:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:59,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 356 transitions. [2023-11-12 02:32:59,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 44.5) internal successors, (356), 8 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:59,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:59,585 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:59,585 INFO L175 Difference]: Start difference. First operand has 54 places, 27 transitions, 172 flow. Second operand 8 states and 356 transitions. [2023-11-12 02:32:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 31 transitions, 226 flow [2023-11-12 02:32:59,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 31 transitions, 198 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-12 02:32:59,587 INFO L231 Difference]: Finished difference. Result has 50 places, 25 transitions, 140 flow [2023-11-12 02:32:59,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=25} [2023-11-12 02:32:59,587 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2023-11-12 02:32:59,587 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 25 transitions, 140 flow [2023-11-12 02:32:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 42.68) internal successors, (1067), 25 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:59,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:59,588 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:59,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75bef4a-609f-4fbb-9eee-73d5c3aed590/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:59,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 02:32:59,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1204431918, now seen corresponding path program 3 times [2023-11-12 02:32:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014978726] [2023-11-12 02:32:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat